Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Switch: PTSKMICSDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
231-333 3 Cheboygan MI 9245 CYNERGYCOMM.NET, INC. - MI 348   2005-04-06   
231-384 4 Kalkaska MI 9245 CYNERGYCOMM.NET, INC. - MI 348   2006-02-16   
231-459 1 Boyne City MI 9245 CYNERGYCOMM.NET, INC. - MI 348   2005-04-06   
231-758 3 Petoskey MI 9245 CYNERGYCOMM.NET, INC. - MI 348   2004-06-26   
231-769 4 Muskegon MI 9245 CYNERGYCOMM.NET, INC. - MI 348   2006-06-25   
231-846 2 Cadillac MI 9245 CYNERGYCOMM.NET, INC. - MI 348   2005-08-28   
231-887 3 Manistee MI 9245 CYNERGYCOMM.NET, INC. - MI 348   2005-08-28   
231-928 6 Fremont MI 9245 CYNERGYCOMM.NET, INC. - MI 348   2005-08-28   
231-944 A Traverse City MI 9245 CYNERGYCOMM.NET, INC. - MI 348      
231-944 1 Traverse City MI 9245 CYNERGYCOMM.NET, INC. - MI 348   2004-03-31   
616-433 9 Rockford MI 9245 CYNERGYCOMM.NET, INC. - MI 348   2005-09-01   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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